The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 1996
Filed:
Sep. 02, 1994
Grey Bassinger, Midland, TX (US);
Other;
Abstract
A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of a borehole. The stuffing box has a main body that terminates in a tubing adaptor at the lower end thereof by which it can be mounted to the upper end of a wellhead. The main body forms an upward opening chamber within which an annular seal assembly for sealingly engaging the polished rod is received. The polished rod reciprocatingly extends through the seal assembly and main body. The seal assembly and chamber together form a lubrication chamber that extends outwardly about the seal assembly. The seal assembly moves within the chamber radially of the passageway to align the polished rod with the production tubing of the wellhead. The adaptor forms a pack-off that isolates the seal from the wellbore, and provision is made by which the seal assembly can be replaced without removing the polished rod from the pumpjack unit.